8. Ifa 10 © resistance is connected to an a.c. = v=100sin(814¢+57") V, the power
dissipated by the resistance is +
(^) 10,000 W (8) 1000 W
(©) 250W (0) 500 W
9. Athree phase. four wire 100V(L—L) system supplies a balanced star connected load having
impedance of 10 | 30 © in each phase. How much current is flowing through the neutral?
(A) 10A (0) 14
(C) OA ൩) 5.74
10. If T, is the torque and ‏,ےآ‎ the armature current for a DC series motor, which of the
following relation is valid, after core saturation?
(A) Tat? ‏عه (ق‎
∎ (7५)
© சம்‌ று) Tal,
11. ‘The permissible flux density of cold rolled grain oriented steel used for transformer core is
around :
(^) 1.7 wh/m? (B) 2.7 wh/m?
(C) 3.5 wb/m? (D) 0.5 wb/m?
१2. The nameplate of an energy meter reads ‘1 KWh = 15,000 revolutions’. If the meter completes
150 revalutions during 50 seconds, what is the power in the circuit?
(A) 100117 ൫) ۳۷
(0) 600 W ⋅ (0) 1000 W
13. An ammeter with full scale deflection current of 100 ൧൪. (micro ampere) and internal
resistance of 100 © is required to measure a maximum current of 10 mA. The shunt
resistance value is ‏؛‎
‎(A) 1.10 2 ∎ (B) 1.01 ©
(0) 1.110 (0) 1.00 ©
14. If the moving coil of a voltmeter consists of 100 turns around on a square former which has a
length of 30 mm and flux density in the air gap is 0.09 wh/m*. The deflecting torque on the
coil when carrying a current of 10 mA is:
(4) 278105 ೫% (2) 81% 10571
(0) 2710-011௬ ∎ ⊕≽⊞∷↥∘↝∏⊡
15. A5A, 230 V meter on full load, unity power factor test makes 72 revolutions in 360 seconds.
If the normal disc speed is 600 rev/KWh, what is the percentage error?
(A) 0.12% (B) 1.2%
(C) 0.434% ^ (00) 4.17%
008/2016 4 A